CN1929478B - Method and system for reducing transmission band occupation - Google Patents

Abstract

This invention discloses one method and system to reduce transmission band width, wherein the system comprises sort property generation module, sort property mapping module and transmission control module; the invention method comprises the following steps: setting data sort strategy, data property and relative transmission strategy; generating each type of transmission agreement package accordingto sort strategy; determining each sort of transmission agreement property values according to each data property; transmitting and adjusting each kind of transmission package relative to different transmission strategy and transmission package property values.

Description

A Method of Reducing Transmission Bandwidth Occupation

technical field

The invention relates to mobile communication technology, in particular to a method for reducing transmission bandwidth occupation.

Background technique

At present, due to the limitation of limited bandwidth resources and transmission capacity of the wireless network, as well as interference, multipath fading and other reasons, the air interface between the terminal and the network often has a situation where the transmission bandwidth cannot meet the transmission requirements, for example, due to transmission quality Deterioration, the transmission bandwidth cannot meet the transmission requirements caused by the reduction of available bandwidth resources. In this case, it is necessary to reduce the transmission bandwidth occupied by the downlink service data flow in the service connection to adapt to the change of the air interface environment and avoid the increase of service delay or even service interruption caused by congestion on the network side.

In the prior art, the method for reducing the occupation of downlink transmission bandwidth is usually: the transmission control node (such as RNC or BSC, etc.) in the access network discards part of the data for a certain user, such as the service data of a user with a lower priority , while only transferring another part of the data. For example, when the transmission control node receives 5 transmission protocol packets of the user, it discards the first 2 transmission protocol packets, and only sends the last 3 transmission protocol packets to the user through the air interface, thereby reducing the downlink transmission bandwidth of the air interface. occupy.

However, in the prior art, in the process of discarding part of the user data, the transmission control node does not consider the importance of the discarded data packets, but performs a blind discarding process. Therefore, it is likely to cause the discarding of key packets related to whether the user can accurately obtain the data content, thereby causing the user to be unable to accurately receive the data, which greatly affects the service experience of the user.

In addition, at present, in order to reduce the occupancy of the downlink transmission bandwidth, there is also a variable rate speech codec scheme (such as AMR) for speech data. In this solution, the system can notify the codec through signaling, and the codec can reduce the occupancy of the downlink transmission bandwidth by changing the codec scheme to reduce the data transmission rate. However, in this scheme, a series of signaling transmission processes must be performed first, and then the downlink transmission bandwidth occupation can be reduced by changing the codec scheme. Therefore, there is a relatively large time delay in the measure of reducing the occupation of the downlink transmission bandwidth, and the signaling overhead on the network side is increased, which wastes network resources.

Contents of the invention

In view of this, the main purpose of the present invention is to provide a method for reducing transmission bandwidth occupation, to ensure the transmission and reception of key packets in the required transmission data to the greatest extent, and to ensure the service experience of users to the greatest extent.

In order to achieve the above object, the technical solution of the present invention is achieved in that:

A method for reducing transmission bandwidth occupation, the method comprising:

A. Set the classification strategy for classifying data, and set the attribute values of various types of data and the corresponding transmission strategies for each attribute value;

B. Classify the data to be transmitted according to the classification strategy and generate various transmission protocol packets, and determine the attribute value of the generated transmission protocol packet according to the attribute value of the data of the generated transmission protocol packet;

C. According to the attribute values of various transmission protocol packets and the transmission strategy corresponding to each attribute value set, adjust when transmitting various transmission protocol packets;

In step A, the transmission strategy includes a first transmission strategy and a second transmission strategy, wherein the first transmission strategy corresponds to making different transmission protocol packets with different attribute values occupy different transmission bandwidths when the transmission bandwidth can meet the transmission requirements The first processing method, the second transmission strategy corresponds to the second processing method that makes the same transmission protocol packet with the same attribute value occupy less transmission bandwidth than the corresponding first processing method when the transmission bandwidth cannot meet the transmission requirements;

Between step B and step C, it further includes: judging whether the current transmission bandwidth cannot meet the transmission requirements, if yes, in step C, according to the attribute values of various types of transmission protocol packets and the corresponding first attribute values of the set attribute values The second processing method in the second transmission strategy adjusts the transmission of various types of transmission protocol packets, otherwise, in step C, according to the attribute values of various types of transmission protocol packets and the first transmission strategy corresponding to the set attribute values The first processing manner performs the above-mentioned adjustments on various types of transmission protocol packets.

In step A, the step of setting a classification strategy for classifying data includes: dividing different data streams into different types of data according to business service quality attributes;

The attribute value is a stream attribute value.

In step A, the step of setting a classification strategy for classifying data includes: according to the degree of impact of data in each type of data flow on business experience from high to low, each part of data in each type of data flow Separately divide into different types of data;

The attribute value is a package attribute value.

In step A, the step of setting a classification strategy for classifying data includes: dividing different data streams into different types of data streams according to business service quality attributes, and according to the impact of data in each type of data stream on business experience From high to low degree of influence, each part of data in each type of data flow is divided into different types of data;

The attribute values are stream attribute values and packet attribute values.

In step A, the step of setting the transmission strategy corresponding to each attribute value includes: setting different flow attribute values corresponding to different transmission strategies, and setting different packet attribute values corresponding to different transmission strategies;

Said step C comprises: firstly, according to the flow attribute values of various types of transmission protocol packets and the different transmission policies corresponding to the set different flow attribute values, adjustments are made when transmitting various types of transmission protocol packets; The attribute values and the different transmission policies corresponding to the set different packet attribute values are adjusted when transmitting various transmission protocol packets.

The stream attribute value is a self-defined value, or the address and port number information of the connection.

The judging whether the current transmission bandwidth cannot meet the transmission requirements is based on the current signal strength value, and/or the current bit error rate, and/or the number of queues storing data in the current transmission control node, and/or the current signal strength value. to noise ratio.

The transmission strategy includes: different transmission processing methods, and/or different modulation methods, and/or different channel coding methods, and/or different encryption protection degrees.

When the transmission strategy is a different transmission processing method, the different transmission processing methods include: using different priority queue processing, and/or whether to perform packet loss processing, and/or whether to use an acknowledgment mechanism, and/or whether to select a different route, and/or use a different transmission technology;

When the transmission strategies are different channel coding methods, the different channel coding methods are: convolutional codes, and/or Turbo codes, and/or space-time codes;

When the transmission strategy is a different modulation method, the different modulation method is: FSK or PSK;

When the transmission strategy is a different degree of encryption protection, the different degree of encryption protection is: choose whether to encrypt, and/or choose a different encryption algorithm.

When the transmission strategy includes different priority queue processing in different transmission processing methods, and/or whether to perform packet loss processing and/or whether to use an acknowledgment mechanism, in step C, when transmitting various types of transmission protocol packets The adjustment steps include: distributing the transmission protocol packets whose attribute value corresponds to the transmission policy to be processed by the higher priority queue to the higher priority queue for sending, and assigning the attribute value corresponding to the transmission policy to the lower priority queue. The protocol packet is distributed to a queue with a lower priority for sending; and/or, the transmission strategy corresponding to the attribute value is sent directly and/or the transmission protocol packet using the confirmation mechanism is sent directly and/or using the confirmation mechanism, and the attribute value is sent directly and/or using the confirmation mechanism If the corresponding transmission policy is discarded, the transport protocol packets are discarded directly.

In step B, the step of classifying, generating various types of transmission protocol packets and determining attribute values is carried out by the classification attribute generation module;

Said step B further comprises:

B11, the classification attribute generation module writes the attribute values of various transmission protocol packets into the application layer of various transmission protocol packets, and then sends various transmission protocol packets to the classification attribute mapping module;

B12. After the classification attribute mapping module receives various transmission protocol packets, it adjusts the attribute values in the application layer of various transmission protocol packets according to the preset mapping strategy and maps them to the transmission protocol layers of various transmission protocol packets respectively. Then send various transmission protocol packets to the transmission control module;

Before performing the adjustment, the step C further includes: the transmission control module obtains the attribute values of various transmission protocol packets from the transmission protocol layers of the various transmission protocol packets received;

In step C, the transmission adjustment step is performed by the transmission control module according to the acquired attribute values of various types of transmission protocol packets.

In step B, the step of classifying, generating various types of transmission protocol packets and determining attribute values is carried out by the classification attribute generation module;

Said step B further comprises:

B21, the classification attribute generation module writes the attribute values of various transmission protocol packets into the application layer of various transmission protocol packets respectively, and then sends various transmission protocol packets to the classification attribute mapping module;

B22, the classification attribute mapping module forwards the various transmission protocol packets received to the transmission control module;

Before performing the transmission adjustment, the step C further includes: the transmission control module maps the attribute values in the application layer of various transmission protocol packets to its own transmission protocol layer according to the preset mapping strategy, and obtains the The attribute values of various transmission protocol packets are obtained in the layer, or the transmission control module directly obtains the attribute values of various transmission protocol packets in the application layer;

In step C, the adjustment step is performed by the transmission control module according to the acquired attribute values of various types of transmission protocol packets.

The classification attribute generation module is a network entity with a codec function on the network side; the classification attribute mapping module is a border gateway on the network side; the transmission control module is a network entity that controls transmission on the network side.

The classification attribute generation module, classification attribute mapping module and transmission control module are in the terminal.

The step of mapping includes: directly writing the attribute values in the application layer of various transmission protocol packages into the transmission protocol layer, or modifying the attribute values in the application layer of various transmission protocol packages to higher or lower classification Write the attribute value into the transmission protocol layer, or map the attribute value in the application layer of various transmission protocol packages to a self-defined attribute value.

Visible, the method that the present invention proposes has the following advantages:

1. In the present invention, according to the importance of the data content, that is, whether it can be related to the information on whether the user can obtain the data content, the business data is divided into various transmission protocol packets with different attribute values. Therefore, the transmission bandwidth cannot meet the transmission requirements. When required, the transport protocol packets on the same connection can be processed differently according to the attribute values of the transport protocol packets. For example, the transport protocol packets with higher priority attribute values are sent directly, and the transmission protocol packets with lower priority attribute values are sent directly. Protocol packets are directly discarded, etc., so as to ensure that the key packets that require high service quality and are related to whether the user can obtain data content information are sent to the user, so that the user can accurately obtain the data content, and maximize the user's business experience , increasing user satisfaction with operators.

2. In the present invention, when it is found that the transmission bandwidth cannot meet the transmission requirements, various transmission protocol packets can be immediately adjusted for transmission without any signaling transmission process and any waiting process. The occupancy of the transmission bandwidth can relieve the transmission pressure in time and avoid congestion on the network side.

3. In the present invention, when the transmission bandwidth cannot meet the transmission requirements, the network side can adjust the transmission strategy of various transmission protocol packets in time without using any signaling, and reduce the occupation of the transmission bandwidth. Therefore, the network side is saved. Signaling overhead saves network resources.

4. In the present invention, when the transmission quality returns to normal, that is, when the transmission bandwidth can meet the transmission requirements, the network can automatically resume data transmission without manual intervention, and smoothly resume data processing.

Description of drawings

Figure 1 is a schematic diagram of the system of the present invention.

Fig. 2 is a flowchart of an embodiment of the present invention for reducing the occupation of transmission bandwidth in the downlink transmission direction.

Fig. 3 is a schematic diagram of grouping according to various types of data in a data stream in an embodiment of the present invention.

Fig. 4 is a schematic diagram of a transmission protocol packet generated in an embodiment of the present invention.

Fig. 5 is a schematic diagram of mapping performed by the GGSN in the embodiment of the present invention.

Fig. 6 is a schematic diagram of retaining the original stream attribute value and packet attribute value of the transport protocol packet during the mapping process in the embodiment of the present invention.

Fig. 7 is a schematic diagram of classification processing performed by a transmission control node in an embodiment of the present invention.

Detailed ways

Figure 1 is a schematic diagram of the system of the present invention. Referring to Fig. 1, the system of the present invention includes a classification attribute generation module A1, a classification attribute mapping module A2 and a transmission control module A3, wherein the classification attribute mapping module A2 is connected to the classification attribute generation module A1 and the transmission control module A3 respectively. The classification attribute generation module A1 is used to classify the data to be transmitted according to the classification strategy to generate various transmission protocol packets, and to generate various transmission protocol packets according to the attribute values of various types of data after the preset classification. The attribute value is carried in the application layer, and then various transmission protocol packets are sent to the classification attribute mapping module A2; the classification attribute mapping module A2 maps the attribute values in the application layer of various transmission protocol packets to the transmission protocol layer, and then Various transmission protocol packets are sent to the transmission control module A3; the transmission control module A3 transmits various transmission protocol packets according to the attribute values in the transmission protocol layer of various transmission protocol packets and different transmission strategies corresponding to different attribute values set in advance Adjustment.

Referring to Fig. 1, when the present invention realizes reducing the occupation of transmission bandwidth on the uplink transmission direction, each module in the system of the present invention shown in Fig. 1, i.e. classification attribute generation module A1, classification attribute mapping module A2 and transmission control Module A3, integrated in the terminal at the sending side.

When the present invention reduces the occupancy of the transmission bandwidth in the downlink transmission direction, the classification attribute generation module A1 in the system of the present invention is an independent network entity with a codec function on the network side, such as an application server (AS) and a codec etc., the classification attribute mapping module A2 and the transmission control module A3 may be independent network entities, that is, the classification attribute mapping module A2 is a border gateway on the network side, and the transmission control module A3 is a transmission control node that can control transmission on the network side, Such as routers and base stations, etc., the classification attribute mapping module A2 and the transmission control module A3 can also be integrated in one network entity, for example, the classification attribute mapping module A2 and the transmission control module A3 are integrated in the base station on the network side.

The core idea of the method of the present invention is: set the strategy for classifying data, and set the attribute values of various types of data after classification and the transmission strategy corresponding to each attribute value; Generate various types of transmission protocol packets, and determine the attribute values of the generated transmission protocol packets according to the attribute values of the data that generate the transmission protocol packets; Various transmission protocol packets are adjusted for transmission.

Among them, when performing classification, setting attribute values, and performing transmission adjustment according to attribute values, the present invention may have three methods: 1. Classify different data streams, divide them into different types of data streams, and set different types of data streams. different stream attribute values corresponding to different data streams, when performing transmission adjustment, different transmission processes are performed according to different stream attribute values of each transport protocol packet; different types of data, and set different types of data to correspond to different packet attribute values. When performing transmission adjustments, different transmission processes are performed according to different packet attribute values of each transmission protocol packet; 3. Classify different data streams, Divide it into different types of data streams, and set the different types of data streams to correspond to different stream attribute values, and classify the data in the same data stream, divide them into different types of data, and set different The data of each class corresponds to different packet attribute values. When performing transmission adjustment, firstly perform different transmission processing according to the stream attribute values of each transmission protocol packet, and then perform different transmission processing according to the packet attribute values of each transmission protocol packet.

In addition, the process of adjusting the transmission of various transmission protocol packets according to the set transmission strategy in the present invention can be carried out only when the transmission bandwidth cannot meet the transmission requirements, that is to say, only when the transmission bandwidth cannot meet the transmission requirements, this method is adopted. Invent methods to ensure the transmission of critical packets in the data.

The process of adjusting the transmission of various transmission protocol packets according to the set transmission strategy of the present invention can also be carried out under any circumstances, that is to say, regardless of whether the transmission bandwidth meets the transmission requirements, the method of the present invention can be used to ensure data However, it should be noted that in this case, the present invention can set two transmission strategies for the same attribute value, the first transmission strategy and the second transmission strategy, wherein the first transmission strategy corresponds to the transmission bandwidth The first processing method is to make different transmission protocol packets with different attribute values occupy different transmission bandwidths when the transmission requirements can be met, and the second transmission strategy corresponds to making the same transmission protocol packets with the same attribute value when the transmission bandwidth cannot meet the transmission requirements. The corresponding first processing method takes up a second processing method with less transmission bandwidth. In this way, the present invention first judges whether the current transmission bandwidth cannot meet the transmission requirements before adjusting the transmission of each transmission protocol packet, and if so, then according to each The second processing method in the second transmission strategy corresponding to the attribute value of the transmission protocol packet and the set attribute values adjusts the transmission of various transmission protocol packets; otherwise, according to the attribute values of various transmission protocol packets and the set The first processing method in the first transmission strategy corresponding to each attribute value of , adjusts the transmission of various transmission protocol packets. For example, the transmission protocol packet with the preset packet attribute value A corresponds to the less used correction in the first transmission strategy error code, and corresponds to the least error-correcting code used in the second transmission strategy, then in the present invention, before transmitting each transmission protocol packet, it is first judged whether the current transmission bandwidth can meet the transmission requirements, and if it can be satisfied, then for the attribute The transmission adjustment for the transmission protocol packet with the value A is to use less error correction codes to transmit the transmission protocol packet with the attribute value A. When the transmission environment deteriorates and the transmission bandwidth cannot meet the transmission requirements, then for the attribute value The transmission adjustment for the transmission protocol packet of A is to use the least error correction code to transmit the transmission protocol packet with the attribute value of A. For another example, the transmission protocol packet with the preset packet attribute value of B corresponds to the first transmission strategy The use of lower priority queues, and corresponding to the direct discard in the second transmission strategy, then in the present invention, before transmitting each transmission protocol packet, it is first judged whether the current transmission bandwidth can meet the transmission requirements, if it can be satisfied, then The transmission adjustment for the transmission protocol packet whose attribute value is B is to use a lower priority queue to transmit the transmission protocol packet whose attribute value is B. When the transmission environment deteriorates and the transmission bandwidth cannot meet the transmission requirements, then for The transmission adjustment carried out by the transmission protocol packet whose attribute value is B is directly discarding the transmission protocol packet whose attribute value is B. It can be seen that the present invention can make the transmission protocol packet with the same attribute value more efficient when the transmission environment deteriorates. When the transmission environment is normal, it takes up less transmission bandwidth, and realizes that according to the quality of the transmission environment, that is, whether the transmission bandwidth meets the transmission requirements, the different transmission strategies adopted are dynamically adjusted to occupy different transmission bandwidths, thus making the present invention It has great flexibility and a wider range of use.

In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

In the following, the present invention will be described in detail with regard to the downlink transmission direction and the process of adjusting the transmission of various transmission protocol packets according to the set transmission policy when the transmission bandwidth cannot meet the transmission requirements as an example.

In the following embodiments, the classification attribute generation module A1 in the system of the present invention is a codec on the network side, the classification attribute mapping module A2 is a border gateway, and the transmission control module A3 is a transmission control node on the network side.

In the following embodiments, the implementation process of the present invention will be described by using the above-mentioned third way of classifying, setting attribute values, and performing transmission adjustment according to attribute values.

Fig. 2 is a flowchart of an embodiment of the present invention for reducing the occupation of transmission bandwidth in the downlink transmission direction. Referring to Fig. 2, the present invention reduces the process that downlink transmission bandwidth occupies specifically includes the following steps:

Step 201: Preset a strategy for classifying data, and set attribute values of various types of data after classification and different transmission strategies corresponding to different attribute values.

Here, setting the policy for classifying data includes: a policy for classifying different data streams and a policy for classifying data in the same data stream.

Set the strategy for classifying different data streams: divide different data streams into different types of data streams according to the quality of service (Qos) attribute of the business. For example, for voice data streams and text data streams, the QoS requirements of voice data streams are higher than Text data stream, therefore, voice data stream is divided into one type of data stream, and text data stream is divided into one type of data stream.

The strategy for setting the data classification of the same data flow is: for the same data flow, according to the degree of impact of the data in each type of data flow on business experience from high to low, the data in each type of data flow is divided into different kinds of data. For example, the core part, the secondary part and the edge part of the data stream can be respectively set as one type of data. For example, for speech, the AMR technology can be used to divide the speech into three categories according to the influence of each parameter in the speech coding algorithm on the recovered speech from high to low, namely the core part A class, the secondary part B class and the marginal part C class data.

In this step, when setting the attribute values of various types of data after classification, first set the stream attribute value of the data according to the data stream classification to which the data belongs, and then set the data package attribute value according to the specific classification of the data in the data stream. The set flow attribute value may be a custom value representing the classification of the data flow or the address and port number information of the connection.

In this step, different transmission strategies corresponding to different attribute values can be set by the operator according to the actual service requirements of the network, specifically including different transmission strategies corresponding to different flow attribute values, and different transmission strategies corresponding to different packet attribute values, To ensure that the data flow data with higher priority, that is, the important content in the important data flow can be sent to the UE, while the data flow with lower priority, that is, the unimportant content in the unimportant data flow does not occupy or occupy less downlink Transmission bandwidth. The different transmission strategies described here may include: different transmission processing methods, and/or different modulation methods, and/or different channel coding methods, and/or different encryption protection degrees,

When different transmission strategies are different transmission processing methods, the different transmission processing methods include: using different priority queues for processing, and/or whether to perform packet loss processing, and/or whether to use confirmation mechanisms (including confirmation, non-confirmation and mixed confirmation), and/or whether to select different paths (including different channels), and/or use different transmission technologies (including IP, ATM, etc.), and the different transmission technologies include: TDM, ATM, IP and different Advanced wireless transmission technologies, including FDMA, TDMA, CDMA, OFDM, etc.;

When the different transmission strategies are different channel coding methods, the different channel coding methods are: convolutional codes, and/or Turbo codes, and/or space-time codes;

When different transmission strategies are different modulation methods, the different modulation methods are: FSK (including MSK, GMSK, etc.), PSK (including BPSK, QPSK, 8PSK, 16PSK, etc.), QAM (including 16QAM, 32QAM, 64QAM, etc.) ;

When different transmission policies have different encryption protection levels, the different encryption methods are: selecting whether to encrypt, and/or selecting different encryption algorithms.

Step 202: When transmitting data streams, the codec first classifies the current data streams to be transmitted according to the preset strategy for classifying data streams, and encodes the classified data respectively and generates and transmits them protocol package.

Here, the transmission protocol packet may be, for example, an IP packet.

In this step, the codec first classifies the data in each data stream according to a preset strategy for classifying the same data stream. Then the codec encodes each type of data in the same divided data stream and packs them respectively, that is to say, each transmission protocol packet generated by the codec corresponds to a type of data in the data stream, namely According to the importance of the content of the data stream, the data stream is divided into multiple types of transmission protocol packets, instead of forming the same format of transmission protocol packets without distinguishing the importance of the content of each part of the data stream in the prior art. In addition, FIG. 3 is a schematic diagram of grouping according to various types of data in the data stream in the embodiment of the present invention. Referring to Figure 3, for example, if the data stream generated by the codec is voice, then according to the preset classification strategy, the codec divides the generated voice into three types of data according to the importance of the voice content, type A data, and type B data and C class data. Then, the codec encodes and packs the data of types A, B, and C respectively to form a type A transmission protocol packet, a type B transmission protocol packet, and a type C transmission protocol packet.

Step 203: the codec writes the classification information of the transport protocol packet, that is, its attribute value, into the application layer of the generated transport protocol packet, and then sends the transport protocol packet to the border gateway on the network side.

Here, the transmission protocol packet may be an IP packet or a transmission protocol packet in other protocol formats. For example, when it is an IP packet, the codec can write the attribute value of the IP packet in the type of service (TOS) field of the IP packet.

Here, it should also be noted that if there is only one type of data stream on a connection, the process of classifying and grouping the codec in step 202 above is a process for the same data stream. There are multiple types of data streams, such as video data streams and audio data streams, then the process of classifying and grouping the codecs described in step 202 is a process for the various data streams, for example, for The video data stream is classified and grouped, and the video data stream is classified and grouped.

Referring to Fig. 4, when writing attribute value in this step, be to write corresponding flow attribute value and package attribute value in the generated transmission protocol packet. For example, for the voice data stream, in the generated Class A transmission In the protocol package, the stream attribute value is written as voice, and the package attribute value is written as class A.

Step 204: When the border gateway receives the transport protocol packet from the codec, it maps the attribute value in the application layer of the transport protocol packet to the transport protocol layer of the transport protocol packet.

Here, the mapping process can be exemplified as: the border gateway GGSN maps the flow attribute value and the packet attribute value to the added GTP/IP, or the border gateway PDSN maps the flow attribute value and the packet attribute value to the added GRE/IP medium.

In addition, the border gateway maps the flow attribute value and packet attribute value in the application layer of the transmission protocol packet to the transmission protocol layer, so that the transmission control node can transmit the flow attribute value and packet attribute value in the protocol layer according to the transmission protocol packet in the subsequent process. The attribute value identifies the data flow attribute of the transport protocol packet and the classification of the transport protocol packet in the data stream.

Moreover, when performing mapping, the border gateway performs mapping according to a preset mapping strategy. For example, if the preset mapping strategy is direct mapping, the border gateway directly writes the flow attribute value and packet attribute value in the application layer into the corresponding field in the transport protocol layer without any modification. For another example, the preset mapping strategy is to cancel the intermediate classification and reduce the priority type of processing. When mapping, the border gateway directly maps the flow attribute value of each transport protocol packet, and the packet attribute value is intermediate classification. When the transmission protocol package is mapped, according to the preset mapping policy, the middle-classified package attribute value information in the application layer is modified to a higher or lower-classified package attribute value information, and then written into the transmission protocol layer. For example, when the border gateway receives a Type A transmission protocol packet, a Type B transmission protocol packet, and a Type C transmission protocol packet with the same flow attribute value, when performing mapping, the flow attribute value is directly mapped, that is, directly written, and for The packet attribute values are type A and type C transport protocol packets, and the packet attribute values in the application layer are also directly written into the transport protocol layer, while for the type B transport protocol packets whose packet attribute values are intermediate classifications, they are written into the application layer The packet attribute value of class B is modified to the lower class of packet attribute value of class C and then written into the transport protocol layer.

In addition, referring to Fig. 5, it should be noted that, in this step, when performing the mapping process according to the mapping policy, the original packet attribute value and flow attribute value of the transport protocol packet can also be retained in the transport protocol packet, and according to The mapping strategy adds the mapped packet attribute value and flow attribute value in the transport protocol packet, so as to restore the original packet attribute value and flow attribute value.

Fig. 6 is a schematic diagram of mapping performed by the GGSN in the embodiment of the present invention. Referring to Figure 6, for example, the border gateway is GGSN, and the transmission protocol packet received by GGSN is an IP packet, then GGSN maps the attribute value and codec information in the TOS domain of the application layer IP1 in the IP packet to the transmission protocol layer IP2 In the TOS domain in.

Step 205: the border gateway sends the mapped transport protocol packet to the transport control node.

Step 206: After receiving the transmission protocol packet, the transmission control node judges whether the current transmission bandwidth cannot meet the transmission requirements, if yes, execute step 207, otherwise, execute the existing process of normally sending the received transmission protocol packet , end the current process.

Here, when judging whether the current transmission bandwidth cannot meet the transmission requirements, the transmission control node may base on the current signal strength value, and/or the current bit error rate, and/or the number of queues storing data in the current transmission control node, and/or the current signal-to-noise ratio to determine whether the current transmission bandwidth cannot meet the transmission requirements.

For example, the transmission control node obtains the current signal strength value according to the measurement report reported by the terminal, and then judges whether the obtained signal strength value is less than the preset signal strength threshold, and if so, considers that the current transmission bandwidth cannot meet the transmission requirements;

For another example, the transmission control node acquires the current bit error rate according to the measurement report reported by the terminal, and then judges whether the acquired bit error rate is greater than the preset bit error rate threshold, and if so, considers that the current transmission bandwidth cannot meet the transmission requirements;

As another example, when the transmission control node acquires the current signal strength value and bit error rate, it may first determine whether the acquired signal strength value is less than the preset signal strength threshold, and if so, then determine whether the acquired bit error rate is greater than the preset If it is, it is considered that the current transmission quality has deteriorated. You can also first judge whether the obtained bit error rate is greater than the preset bit error rate threshold. If so, then judge whether the obtained signal strength value is less than Pre-set signal strength threshold, if it is, it is considered that the current transmission bandwidth cannot meet the transmission requirements.

Step 207: The transmission control node obtains the attribute values in the transmission protocol layer of each received transmission protocol packet, and performs transmission processing on each transmission protocol packet according to different transmission strategies corresponding to different preset attribute values.

Here, the attribute value of each transmission protocol packet acquired by the transmission control node includes a flow attribute value and a packet attribute value of each transmission protocol packet. Referring to Fig. 7, in this step, at first use flow classifier and according to the flow attribute value of each transmission protocol packet each transmission protocol packet of the same flow attribute value is divided into a flow processor, then in the flow processor, use The packet classifier divides each transmission protocol packet with the same packet attribute value into a packet processor according to the packet attribute value of each transmission protocol packet. The transmission control node can first transmit and process different transmission protocol packets corresponding to different flow attribute values according to different transmission policies corresponding to different flow attribute values set in advance. If the transmission bandwidth still cannot meet the transmission requirements, the same flow attribute can be further processed. Transport protocol packets with different values but different packet attribute values are processed for transmission.

For example, the process of transmitting and processing each transmission protocol packet according to the transmission strategies corresponding to different attribute values described in this step may be: for example, the transmission control node receives 4 transmission protocol packets with a flow attribute value of 1, and the flow attribute For the four transmission protocol packets with a value of 2, among the different transmission strategies corresponding to different flow attribute values set in advance, the transmission strategy corresponding to the flow attribute value 1 is to send directly without performing packet loss processing, and the transmission strategy corresponding to the flow attribute value 2 The strategy is to perform packet loss processing, so the transmission control node directly sends the 4 transport protocol packets with the flow attribute value 1 to the next-level receiving end, and directly discards the 4 transport protocol packets with the flow attribute value 2. If the transmission bandwidth still cannot meet the transmission requirements, and among the different transmission strategies corresponding to different packet attribute values set in advance, the transmission strategy corresponding to the packet attribute value of type A is to send directly without performing packet loss processing, and the packet attribute value corresponds to type B The transmission strategy is to discard according to the proportion of half, and the transmission strategy corresponding to the packet attribute value of class C is to discard all, and in this step, among the 4 transmission protocol packets with the flow attribute value of 1, 2 transmission protocol packets are of type A Packets, 2 transport protocol packets are Class B packets, and 1 transport protocol packet is Class C packets. Then, the transmission control node directly transmits the two type A packets with the flow attribute value of 1 to the terminal, and the transmission control node directly transmits one of the two type B packets with the flow attribute value of 1 to the terminal, and, The transmission control node directly discards the class C packets whose flow attribute value is 1. In order to illustrate its effect, it can be assumed that the current AMR speech coding scheme with a rate of 12.2K is used, and the total number of bits is 244, of which 81 are class A packets with a stream attribute value of 1, and class B packets with a stream attribute value of 1 103. Class C packets with a flow attribute value of 1 account for 60, so after the transmission control node discards the C type packets with a flow attribute value of 1, the transmission rate is reduced by 1/4, the bandwidth occupation is reduced, and the transmission control node discards half of the packets. After class B packets with a flow attribute value of 1, the transmission rate is reduced by about 1/2, which further reduces bandwidth occupation.

If the preset transmission strategies are different modulation methods, such as BPSK and 8PSK for different rates, if the user transmission bandwidth rate changes, different adjustment methods can be adopted.

If the pre-set transmission strategy is different channel coding methods, such as convolutional codes, Turbo codes, etc., convolutional codes and Turbo codes have different rates, for example, Turbo codes can have different rates, such as 1/2, 2 /3, 3/4, etc., respectively containing 1/2, 1/3, 1/4 redundant information for error correction (the more redundant information, the more it can ensure correct recovery of the original information, the less redundant information The more the data rate can be guaranteed), when the transmission quality changes, different channel coding rates can be used for adaptation. If the 1/2 method is used, if the total bandwidth remains unchanged, the transmission data delay needs to be increased or some Data is discarded.

So far, the process of reducing the transmission bandwidth occupation when the transmission bandwidth cannot meet the transmission requirements is completed, and the user's business usage can be ensured, and when the transmission quality is restored to good, the normal data transmission can be resumed immediately.

In the above-mentioned embodiments of the present invention, the stream attribute value corresponding to the transport protocol package is written in the generated transport protocol package. The flow attribute value corresponding to the transmission protocol packet is determined by using the flow attribute value, so as to realize the process of adjusting the transmission according to the flow attribute value. In other embodiments of the present invention, the corresponding stream attribute value may not be written in the transport protocol packet, but a specific connection is used to identify the stream attribute value of the transport protocol packet sent on the connection, correspondingly, In the subsequent transmission adjustment, the flow attribute value corresponding to the transmission protocol packet is determined according to the connection used by the transmission protocol packet, so as to realize the process of performing transmission adjustment according to the flow attribute value. For example, if the stream attribute value of the generated transport protocol packet 1 is 1, and the stream attribute value of transport protocol packet 2 is 2, after generation, use the connection 1 corresponding to the stream attribute value 1 to send the transport protocol packet 1, and use the corresponding Connection 2 with flow attribute value 2 sends transmission protocol packet 2. In this way, when subsequent transmission adjustments are made, since transmission protocol packet 1 is received from connection 1, the flow attribute value 1 of transmission protocol packet 1 can be determined according to connection 1 , since the transmission protocol packet 2 is received from the connection 2, the flow attribute value 2 of the transmission protocol packet 2 can be determined according to the connection 2, so as to perform corresponding transmission adjustments.

In the above embodiments of the present invention, the border gateway maps the attribute value in the application layer of the transport protocol packet to the transport protocol layer, so that the transport control node can identify and acquire the attribute value of the transport protocol packet. In other embodiments of the present invention, the border gateway may directly forward the transmission protocol packet to the transmission control node without performing the mapping process, and the transmission control node performs all the mapping processes described in step 204 to obtain various For the attribute value of the transmission protocol packet, when the transmission control node performs the mapping, the transmission control node maps the attribute values in the application layer of various transmission protocol packets to RLC and MAC, or the transmission control node can directly analyze and The principle of the specific implementation process of acquiring the attribute value in the application layer of the transport protocol packet is the same as that of the above-mentioned embodiment. In addition, all routers that send transmission protocol packets can also perform the above-described mapping of the attribute values of the transmission protocol packets, and perform the process of adjusting the transmission of each transmission protocol packet according to the attribute values performed by the transmission control node in the above embodiment .

In addition, in order to achieve a better effect of reducing the occupied transmission bandwidth, the present invention can also be combined with the existing technology, that is, when the transmission control node finds that transmission adjustment needs to be performed, it uses the transmission protocol described in the present invention In the process of transmitting and processing the priority of the packet, at the same time, send the adjustment rate signaling to the codec, so that the codec can adjust its own codec rate, reduce the data transmission rate to adapt to the reduction of available bandwidth, and can greatly Reduce bandwidth usage and relieve pressure.

The process of reducing the occupation of the transmission bandwidth in the uplink transmission direction of the present invention is the same as the process of reducing the occupation of the transmission bandwidth in the downlink transmission direction described in the above-mentioned embodiments.

The method and system for reducing transmission bandwidth occupation proposed by the present invention can be applied to all wireless networks, such as wideband code division multiple access (WCDMA), code division multiple access (CDMA), wireless local area network (WLAN), WIMAX, DVB and broadcasting wait. When applied to a WCDMA system, the border gateway described in the above embodiments of the present invention can be exemplified as GGSN, and the transmission control node can be exemplified as RNS (including RNC and Node B). When applied to a CDMA2000 system, the border gateway described in the above embodiments of the present invention can be exemplified as a PDSN, and the transmission control node can be exemplified as a BSS (including BSC/PCF and BTS).

In a word, the above descriptions are only preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (15)

1. A method for reducing transmission bandwidth occupation, characterized in that the method may further comprise the steps: A. Set the classification strategy for classifying data, and set the attribute values of various types of data and the corresponding transmission strategies for each attribute value; B. Classify the data to be transmitted according to the classification strategy and generate various transmission protocol packets, and determine the attribute value of the generated transmission protocol packet according to the attribute value of the data of the generated transmission protocol packet; C. According to the attribute values of various transmission protocol packets and the transmission strategy corresponding to each attribute value set, adjust when transmitting various transmission protocol packets; In step A, the transmission strategy includes a first transmission strategy and a second transmission strategy, wherein the first transmission strategy corresponds to making different transmission protocol packets with different attribute values occupy different transmission bandwidths when the transmission bandwidth can meet the transmission requirements The first processing method, the second transmission strategy corresponds to the second processing method that makes the same transmission protocol packet with the same attribute value occupy less transmission bandwidth than the corresponding first processing method when the transmission bandwidth cannot meet the transmission requirements; Between step B and step C, it further includes: judging whether the current transmission bandwidth cannot meet the transmission requirements, if yes, in step C, according to the attribute values of various types of transmission protocol packets and the corresponding first attribute values of the set attribute values The second processing method in the second transmission strategy adjusts the transmission of various types of transmission protocol packets, otherwise, in step C, according to the attribute values of various types of transmission protocol packets and the first transmission strategy corresponding to the set attribute values The first processing manner performs the above-mentioned adjustments on various types of transmission protocol packets. 2. The method according to claim 1, wherein in step A, the step of setting a classification strategy for classifying data comprises: dividing different data streams into different types of data according to business service quality attributes ; The attribute value is a stream attribute value. 3. The method according to claim 1, wherein in step A, the step of setting a classification strategy for classifying data comprises: according to the impact of data in each type of data flow on business experience from high to high To a low degree, each part of the data in each type of data stream is divided into different types of data; The attribute value is a package attribute value. 4. The method according to claim 1, wherein in step A, the step of setting a classification strategy for classifying data comprises: dividing different data streams into different types of data according to business service quality attributes flow, and divide each part of data in each type of data flow into different types of data according to the degree of impact of data in each type of data flow on business experience from high to low; The attribute values are stream attribute values and packet attribute values. 5. The method according to claim 4, wherein in step A, the step of setting the transmission strategy corresponding to each attribute value comprises: setting different flow attribute values corresponding to different transmission strategies, and setting different packet attribute values Corresponding to different transmission strategies; Said step C comprises: firstly, according to the flow attribute values of various types of transmission protocol packets and the different transmission policies corresponding to the set different flow attribute values, adjustments are made when transmitting various types of transmission protocol packets; The attribute values and the different transmission policies corresponding to the set different packet attribute values are adjusted when transmitting various transmission protocol packets. 6. The method according to claim 2, 4 or 5, characterized in that the stream attribute value is a self-defined value, or information about the address and port number of the connection. 7. The method according to claim 1, wherein the judging whether the current transmission bandwidth cannot meet the transmission requirements is based on the current signal strength value, and/or the current bit error rate, and/or the current transmission control The number of queues holding data in the node, and/or the current signal-to-noise ratio. 8. The method according to claim 1, 2, 3, 4 or 5, wherein the transmission strategy comprises: different transmission processing methods, and/or different modulation methods, and/or different channel coding methods, and/or different degrees of encryption protection. 9. The method according to claim 8, wherein when the transmission strategy is a different transmission processing method, the different transmission processing methods include: using different priority queues for processing, and/or whether to perform packet loss processing, and/or whether an acknowledgment mechanism is used, and/or whether a different path is chosen, and/or a different transmission technique is used; When the transmission strategies are different channel coding methods, the different channel coding methods are: convolutional codes, and/or Turbo codes, and/or space-time codes; When the transmission strategy is a different modulation method, the different modulation method is: FSK or PSK; When the transmission policies are different encryption protection levels, the different encryption protection levels are: selecting whether to encrypt, and/or selecting different encryption algorithms. 10. The method according to claim 9, wherein when the transmission strategy includes different priority queue processing in different transmission processing methods, and/or whether to perform packet loss processing and/or whether to use an acknowledgment mechanism, In step C, the step of adjusting when transmitting various types of transmission protocol packets includes: distributing the transmission protocol packets whose attribute value corresponds to the transmission policy to be processed by a higher priority queue to a queue with a higher priority for sending, Distributing the transmission protocol packets whose attribute value corresponds to the transmission strategy to the lower priority queue to the lower priority queue for transmission; and/or, assigning the attribute value corresponding to the transmission strategy to direct transmission and/or transmission using an acknowledgment mechanism The protocol packet is sent directly and/or using the confirmation mechanism, and the transmission protocol packet whose attribute value corresponds to the transmission strategy is discarded is directly discarded. 11. The method according to claim 1, characterized in that, in step B, the step of performing the classification, generating various transmission protocol packets and determining the attribute value by the classification attribute generation module; Said step B further comprises: B11, the classification attribute generation module writes the attribute values of various transmission protocol packets into the application layer of various transmission protocol packets, and then sends various transmission protocol packets to the classification attribute mapping module; B12. After the classification attribute mapping module receives various transmission protocol packets, it adjusts the attribute values in the application layer of various transmission protocol packets according to the preset mapping strategy and maps them to the transmission protocol layers of various transmission protocol packets respectively. Then send various transmission protocol packets to the transmission control module; Before performing the adjustment, the step C further includes: the transmission control module obtains the attribute values of various transmission protocol packets from the transmission protocol layers of the various transmission protocol packets received; In step C, the transmission adjustment step is performed by the transmission control module according to the acquired attribute values of various types of transmission protocol packets. 12. The method according to claim 1, characterized in that, in step B, the step of performing the classification, generating various transmission protocol packets and determining the attribute value by the classification attribute generation module; Said step B further comprises: B21, the classification attribute generation module writes the attribute values of various transmission protocol packets into the application layer of various transmission protocol packets respectively, and then sends various transmission protocol packets to the classification attribute mapping module; B22, the classification attribute mapping module forwards the various transmission protocol packets received to the transmission control module; Before performing the transmission adjustment, the step C further includes: the transmission control module maps the attribute values in the application layer of various transmission protocol packets to its own transmission protocol layer according to the preset mapping strategy, and obtains from the transmission protocol The attribute values of various transmission protocol packets are obtained in the layer, or the transmission control module directly obtains the attribute values of various transmission protocol packets in the application layer; In step C, the adjustment step is performed by the transmission control module according to the acquired attribute values of various types of transmission protocol packets. 13. The method according to claim 11 or 12, wherein the classification attribute generation module is a network entity with a codec function on the network side; the classification attribute mapping module is a border gateway on the network side; the transmission The control module is a network entity that controls transmission on the network side. 14. The method according to claim 11 or 12, wherein the classification attribute generation module, classification attribute mapping module and transmission control module are in the terminal. 15. The method according to claim 11 or 12, characterized in that the step of mapping comprises: directly writing the attribute values in the application layer of various transmission protocol packets into the transmission protocol layer, or The attribute values in the application layer of the protocol package are modified to higher or lower classified attribute values and then written into the transport protocol layer, or the attribute values in the application layer of various transport protocol packages are mapped to self-defined attribute values.

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